Certificate of Insurance for Cleaning Vendors: A Guide

If you manage a property or an office, at some point a cleaning company will hand you a certificate of insurance, or you will have to ask for one. The COI is one of the most important documents in a commercial cleaning relationship, because it is your protection if something goes wrong while a crew is working in your building, often after hours and unsupervised. This guide explains why property managers require COIs, what coverages to look for, and how to actually read one so you are not just filing a piece of paper you never checked.

What a certificate of insurance is

A certificate of insurance is a one-page summary, issued by an insurance company or broker, that proves a business carries specific insurance coverage. For a cleaning vendor, it documents that they hold the policies that protect you if a cleaner damages property, injures someone, or is hurt on your premises. The COI lists the insurer, the policy numbers, the coverage types, the limits, and the effective and expiration dates.

The key thing to understand is that a COI is proof of coverage, not the policy itself. It tells you coverage exists as of the date it was issued. That is why the details, especially expiration dates and coverage limits, matter.

Why property managers require them

Cleaning is a higher-risk vendor relationship than it looks. Crews work inside your building, handle keys and access, operate equipment, use chemicals, and are often alone after hours. If something goes wrong and the vendor is uninsured, the liability can flow to you as the property owner or manager. A COI shifts that risk to where it belongs.

Concrete scenarios a COI protects against:

• A cleaner knocks over and damages expensive equipment or a tenant's property
• A wet floor from mopping causes a slip-and-fall injury to a visitor or employee
• A crew member is injured on your property while working
• A cleaning chemical damages a floor finish or furnishing

Without vendor insurance, you or your building could end up paying for these. With a valid COI, the vendor's coverage responds. This is why most commercial leases and property management policies flatly require proof of insurance before a cleaning vendor sets foot in the building, frequently with the property owner or manager named as an additional insured.

The coverages to check

Not all insurance is equal, and a COI can list coverage that is too thin to actually protect you. Here is what to look for.

General liability

This is the core coverage. It responds to property damage and bodily injury the vendor causes. Look at the limits. A common baseline is $1,000,000 per occurrence and $2,000,000 aggregate, though larger buildings and higher-value spaces often require more. If the limits look low relative to what is in your building, that is a conversation to have before signing.

Workers compensation

If a cleaner is injured on your property and the company does not carry workers comp, that injury can become your liability. Workers comp is required in Illinois for businesses with employees. Confirm the COI shows it. A cleaning company that claims all its workers are independent contractors to avoid workers comp is a real red flag worth scrutinizing.

Janitorial bond

A bond is technically not insurance, but it belongs in the same conversation. A janitorial bond protects you against theft by the cleaning staff. Because crews often work alone and after hours with access to the space, bonding matters more in this industry than in most. Ask whether the vendor is bonded and for how much.

Additional insured status

For meaningful protection, ask to be named as an additional insured on the vendor's general liability policy. This extends the vendor's coverage to protect you directly in a claim, rather than leaving you to argue about it after the fact. A reputable vendor handles this routinely; it should not be a fight.

How to read a COI before you sign

When a cleaning vendor hands you a certificate, actually check these things rather than filing it:

1. The insured name matches the company you are contracting with, not a different entity.
2. The coverage types include general liability and workers compensation at minimum.
3. The limits are adequate for your building and meet any requirement in your lease or management policy.
4. The dates are current. A COI expires. Coverage that lapsed two months ago protects no one. Note the expiration and set a reminder to request an updated certificate each renewal.
5. You are listed as additional insured if you requested it and your policy requires it.
6. The certificate came from the insurer or broker, not a document the vendor typed up themselves. Legitimate COIs are issued by the insurance provider.

If anything is missing, unclear, or expired, ask before the contract starts. A trustworthy vendor provides a clean, current certificate without excuses. Hesitation or an "I'll send it later" that never comes is your answer, and it ties directly to the broader vetting process in our how to hire a commercial cleaning company guide.

Keep COIs current over the life of the contract

A COI is a snapshot, so the job is not done at signing. Policies renew annually, and coverage can lapse if a vendor stops paying premiums. Best practice is to request an updated certificate at each policy renewal and keep the current one on file. Many property managers track vendor COI expiration dates the same way they track lease dates, precisely so a coverage gap never goes unnoticed. If you are switching vendors, confirming the incoming company's COI is valid before the transition is part of a clean handoff; see switching commercial cleaning companies.

The bottom line

A certificate of insurance is your protection against the real risks of letting a crew work in your building. Require one before any cleaning vendor starts, check for general liability, workers compensation, and adequate limits, ask to be named as an additional insured, confirm the dates are current, and keep it updated at every renewal. It takes five minutes and it is the difference between the vendor's insurance responding to a problem and you paying for it.

We provide current proof of insurance and bonding up front as part of every proposal. To see it and get your space priced, request a Free Walkthrough & Quote through our estimate form, and learn more about our commercial cleaning and janitorial services programs.